Artem Sapegin

• Introduced Storybook and built a component library of about 30 components, aligned with the designers’ Figma library to improve consistency and reduce custom styles.
• Built about 20 marketing components with Storybook docs, cutting new campaign landing pages from about 1 month to 1–2 days; shipped 10+ campaign pages and a new homepage. Later set up a CMS workflow so marketing can publish multiple pages per month without engineer involvement.
• Replaced a 15-step manual deployment process (plus an extra pull request approval) with a fully automated GitHub Actions workflow, so any developer can deploy changes themselves.
• Accessibility champion for European Accessibility Act (EAA) readiness: audit, 30+ fixes (keyboard, screen reader, motion safety), ongoing teammate reviews and guidance; added keyboard accessibility tests for main app flows. Scanners now report no real issues.

• Led frontend for the booking cancellation experience on React Native and web, with a shared codebase across platforms.
• Took a team from no automated checks to a full setup for linting, formatting, unit tests, and integration tests, so developers could catch issues early and avoid regressions.
• Contributed to the company component library: layout primitives (styled-system), new components, TypeScript migration, documentation, accessibility fixes, and reviews.
• Conducted over 40 interviews with frontend developers of various levels for all teams (technical questions, coding exercises, and architecture interviews).
• Mentored less senior teammates through code reviews and supervision.

• Participated in JavaScript and CSS working groups on company-wide coding standards and documentation; one of three CSS reviewers in Berlin.
• Spent about 1–2 hours a day on code reviews across Berlin teams (peaks of 20+ reviews in a day); also live reviews, pairing, and weekly frontend office hours.
• Improved the seller tools developer experience: set up JavaScript exception monitoring and contributed to company-wide React component libraries.
• Sponsored engineers through the JS Proficiency program; held brown bag talks on internationalization and types in JavaScript with Flow.

• Introduced a modern frontend stack to the team: React, ES6, CSS Modules, webpack, linting, formatting, and testing.
• Rebuilt the translator tool from a vanilla jQuery server-rendered app to a React single-page app.
• Created a component library of over 70 components used by 5 projects, documented with React Styleguidist (open-source tool I created); backend engineers built new UIs with minimal frontend supervision.
• Automated production deploys from an 8-step manual process to a single command.
• Created several other React apps from scratch.

Frontend developer at Badoo (dating app), Mail.ru (world’s 3rd email service), and GeneGo (biotech research tools).